Lightning protection module layout structure of box-type substation

Abstract

The utility model relates to the technical field of box-type substation lightning protection, and discloses a lightning protection module layout structure of a box-type substation, which comprises a box-type substation box body, the top of the box-type substation box body is provided with a top lightning protection module, and the side wall of the box-type substation box body is provided with a side wall lightning protection module. According to the lightning protection module layout structure of the box-type substation, the lightning protection modules with different functions are arranged at the top, on the side wall and in the box body of the box-type substation, so that a multi-layer lightning protection system from outside to inside is formed, lightning invasion in different directions and with different intensities can be effectively intercepted, and the lightning protection capability of the box-type substation is greatly improved; the lightning protection modules realize cooperative work through a reasonable layout and connection mode, and grounding downleads of the top lightning protection module, the side wall lightning protection module and the internal lightning protection module are jointly connected to the same grounding grid, so that rapid discharge of lightning current is ensured, and the risk that electrical equipment is damaged is reduced.

Description

Technical Field

[0001] This application relates to the field of lightning protection technology for prefabricated substations, specifically to a lightning protection module layout structure for a prefabricated substation. Background Technology

[0002] Prefabricated substations, as integrated power equipment, are widely used in urban power grids, industrial parks, and other locations. However, because they are usually located outdoors, they are susceptible to lightning strikes. The high voltage and large current generated by lightning may enter the interior of the prefabricated substation, damaging electrical equipment such as transformers and switchgear, leading to power outages, affecting normal power supply, and even causing safety accidents.

[0003] Existing lightning protection measures for prefabricated substations mainly focus on installing traditional lightning protection equipment such as lightning rods and surge arresters. However, the layout and structure of these lightning protection devices have some shortcomings. For example, the surge arresters are installed in scattered locations, making it difficult to form an effective overall protection. The lack of reasonable coordination between the various lightning protection modules leads to unsatisfactory lightning protection effects. Therefore, a new type of lightning protection module layout structure for prefabricated substations is needed to improve the lightning protection effect and ensure the safe and stable operation of prefabricated substations. Utility Model Content

[0004] To address the shortcomings of existing technologies, this application provides a lightning protection module layout structure for prefabricated substations, which solves the problems of unreasonable lightning protection module layout and poor lightning protection effect in existing technologies, thereby improving the lightning protection capability of prefabricated substations.

[0005] To achieve the above objectives, this application provides the following technical solution: a lightning protection module layout structure for a prefabricated substation, comprising a prefabricated substation enclosure, a top lightning protection module installed on the top of the enclosure, side wall lightning protection modules installed on the side walls of the enclosure, and an internal lightning protection module installed inside the enclosure. The top lightning protection module includes lightning rods installed at the four corners of the top of the enclosure, each lightning rod being connected to a top grounding down conductor, which extends to the bottom of the enclosure and is grounded. The side wall lightning protection module includes... The system includes multiple surge arresters evenly distributed around the side walls of the prefabricated substation enclosure. Each surge arrester is connected to a side wall grounding down conductor and is grounded through the side wall grounding down conductor. The internal surge protection module includes surge protectors installed above the electrical equipment inside the prefabricated substation enclosure. Each surge protector is connected to an internal grounding down conductor and is grounded through the internal grounding down conductor. A grounding grid is provided at the bottom of the prefabricated substation enclosure. The internal grounding down conductor, the top grounding down conductor, and the side wall grounding down conductor are all connected to the grounding grid at the bottom of the prefabricated substation enclosure.

[0006] The above solution addresses the shortcomings of existing lightning protection modules, which have poor layout and ineffective lightning protection. By installing lightning protection modules with different functions on the top, side walls, and inside the prefabricated substation enclosure, a multi-layered lightning protection system from the outside to the inside is formed. This system can effectively intercept lightning intrusions of different directions and intensities, greatly improving the lightning protection capability of the prefabricated substation. The grounding down conductors of the top, side wall, and internal lightning protection modules are all connected to the same grounding grid, ensuring rapid discharge of lightning current and reducing the risk of damage to electrical equipment.

[0007] Furthermore, the lightning rod is an early discharge type lightning rod, and the installation height of the lightning rod is higher than that of other equipment on the top of the box-type substation enclosure.

[0008] By employing the above-mentioned scheme, an early discharge lightning rod is installed at a height higher than other equipment on the top of the prefabricated substation enclosure. Compared to ordinary lightning rods, the early discharge lightning rod can generate an upward leader earlier, more effectively capture the lightning leader, and introduce the lightning into the ground in advance. This provides more efficient protection for the prefabricated substation from direct lightning strikes. The higher installation height ensures that lightning strikes the lightning rod first, avoiding direct lightning strikes to other equipment on the top of the enclosure, reducing the risk of equipment damage, and improving the overall lightning protection reliability and safety of the prefabricated substation.

[0009] Furthermore, the number of surge arresters installed along the height direction of the side wall of the box-type substation is greater than two at equal intervals.

[0010] With the above scheme, the number of surge arresters installed along the height of the side wall of the prefabricated substation is greater than two at equal intervals. This arrangement makes the surge arresters more densely distributed around the side wall, which can more comprehensively cover the side wall of the box and enhance the protection against lightning-induced overvoltage on the side wall. No matter from which direction or height the lightning approaches the box, the lightning energy can be promptly introduced to the ground through the surge arresters, effectively reducing the indirect impact of lightning on the equipment inside the box and improving the overall lightning protection performance of the prefabricated substation.

[0011] Furthermore, the surge protector adopts a hierarchical setting method, which is divided into a primary surge protector and a secondary surge protector. The primary surge protector is set near the incoming end of the electrical equipment, and the secondary surge protector is set in the control circuit of the electrical equipment.

[0012] With the above scheme, the primary surge protector is installed near the incoming line of the electrical equipment. It can initially suppress and discharge large-value lightning overvoltages entering the prefabricated substation, preventing lightning overvoltages from directly impacting the electrical equipment. The secondary surge protector is installed in the control circuit of the electrical equipment to further provide fine protection against the overvoltages remaining after passing through the primary surge protector. This ensures that sensitive equipment in the control circuit is not affected by lightning overvoltages, greatly improving the electrical equipment's tolerance to lightning overvoltages and ensuring the stable operation of the electrical equipment.

[0013] Furthermore, the top grounding down conductor, the side wall grounding down conductor, and the internal grounding down conductor are all made of copper.

[0014] Through the above scheme, copper has good conductivity, which can quickly and effectively introduce lightning current into the ground, reduce the resistance of the grounding down conductor itself, reduce the voltage drop of lightning current on the down conductor, thereby avoiding backflash caused by excessive down conductor resistance, ensuring that lightning energy can be smoothly discharged into the ground, and improving the reliability and safety of the entire lightning protection system.

[0015] Furthermore, the top of the box-type substation enclosure is equipped with a fixing bracket for fixing the lightning rod, and the fixing bracket is made of stainless steel.

[0016] Through the above solution, the stainless steel fixing bracket has good corrosion resistance and mechanical strength, which can stably fix the lightning rod for a long time, ensuring that the lightning rod will not loosen or be damaged under various harsh environmental conditions, ensuring that the lightning rod is always in good working condition, continuously and effectively playing its role in lightning protection, and improving the stability and reliability of the entire lightning protection module layout structure.

[0017] Furthermore, an insulating gasket is provided between the surge arrester and the side wall of the box-type substation enclosure.

[0018] Through the above solution, the insulating gasket can effectively isolate the electrical connection between the surge arrester and the side wall of the enclosure, preventing some of the lightning current from being conducted through the side wall of the enclosure when it is introduced to the ground through the surge arrester. This prevents the lightning current from causing a potential rise in the enclosure, reduces the possibility of lightning backflash, further protects the equipment inside the enclosure from damage by lightning overvoltage, and improves the lightning protection safety of the prefabricated substation.

[0019] Furthermore, the front of the box-type substation enclosure is hinged with two doors, and the interior of each door is equipped with an observation window.

[0020] The above design allows staff to easily enter and exit the enclosure for equipment installation, debugging, maintenance, and repair, while the observation window allows staff to observe the operating status of the equipment inside the enclosure from the outside without opening the enclosure doors.

[0021] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0022] The lightning protection module layout of this prefabricated substation forms a multi-layered lightning protection system from the outside to the inside by installing different functional lightning protection modules on the top, side walls, and inside of the prefabricated substation. This system can effectively intercept lightning intrusions from different directions and intensities, greatly improving the lightning protection capability of the prefabricated substation. The various lightning protection modules work together through a reasonable layout and connection method. The grounding down conductors of the top lightning protection module, side wall lightning protection module, and internal lightning protection module are all connected to the same grounding grid, ensuring the rapid discharge of lightning current and reducing the risk of damage to electrical equipment. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the entire application;

[0024] Figure 2 This is a diagram of the grounding grid structure for this application;

[0025] Figure 3 This is a front view of the overall cross-section of this application;

[0026] Figure 4 This is a structural diagram of the internal lightning protection module of this application;

[0027] Figure 5 This is a structural diagram of the sidewall lightning protection module of this application;

[0028] Figure 6 This is a structural diagram of the top lightning protection module of this application.

[0029] In the picture:

[0030] 1. Box-type substation enclosure; 2. Top lightning protection module; 201. Lightning rod; 202. Top grounding down conductor; 3. Side wall lightning protection module; 301. Surge arrester; 302. Side wall grounding down conductor; 4. Internal lightning protection module; 401. Surge protector; 402. Internal grounding down conductor; 5. Grounding grid; 6. Fixing bracket; 7. Insulating gasket; 8. Enclosure door. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] Please see Figures 1-6This embodiment describes a lightning protection module layout structure for a prefabricated substation, including a prefabricated substation enclosure 1. A top lightning protection module 2 is installed on the top of the enclosure 1, sidewall lightning protection modules 3 are installed on the side walls of the enclosure 1, and an internal lightning protection module 4 is installed inside the enclosure 1. The top lightning protection module 2 includes lightning rods 201 installed at the four corners of the top of the enclosure 1, each connected to a top grounding down conductor 202 that extends to the bottom of the enclosure 1 and is grounded. The sidewall lightning protection modules 3 include modules evenly distributed around the side walls of the enclosure 1. Multiple surge arresters 301 are provided, each surge arrester 301 is connected to a side wall grounding down conductor 302, and the surge arrester 301 is grounded through the side wall grounding down conductor 302. The internal surge protection module 4 includes a surge protector 401 installed above the electrical equipment inside the box-type substation enclosure 1, the surge protector 401 is connected to an internal grounding down conductor 402, and the surge protector 401 is grounded through the internal grounding down conductor 402. The bottom of the box-type substation enclosure 1 is provided with a grounding grid 5, and the internal grounding down conductor 402, the top grounding down conductor 202 and the side wall grounding down conductor 302 are all connected to the grounding grid 5 at the bottom of the box-type substation enclosure 1.

[0033] Please see Figure 1 , Figure 2 and Figure 6 Lightning rod 201 is an early discharge lightning rod. The installation height of lightning rod 201 is higher than other equipment on the top of the box-type substation 1. By adopting the early discharge type and installing it at a higher height than other equipment on the top of the box-type substation 1, the early discharge lightning rod can generate an upward leader earlier than ordinary lightning rods, more effectively capture the lightning leader, and introduce the lightning into the ground in advance. This provides more efficient protection for the box-type substation from direct lightning strikes. The higher installation height ensures that lightning strikes lightning rod 201 first, avoiding direct lightning strikes to other equipment on the top of the box, reducing the risk of equipment damage, and improving the lightning protection reliability and safety of the entire box-type substation.

[0034] Please see Figure 1 , Figure 2 and Figure 5 The number of surge arresters 301 installed along the height of the side wall of the box-type substation enclosure 1 is greater than that of two equidistant arresters. This arrangement makes the surge arresters 301 more densely distributed around the side wall, which can more comprehensively cover the side wall of the enclosure and enhance the protection against lightning-induced overvoltage on the side wall. No matter which direction or height the lightning approaches the enclosure from, the lightning energy can be promptly introduced to the ground through the surge arresters 301, effectively reducing the indirect impact of lightning on the equipment inside the enclosure and improving the overall lightning protection performance of the box-type substation.

[0035] Please see Figure 3 and Figure 4 The surge protector 401 adopts a hierarchical configuration, consisting of a primary surge protector and a secondary surge protector. The primary surge protector is installed near the incoming line of the electrical equipment, while the secondary surge protector is installed in the control circuit of the electrical equipment. The primary surge protector, located near the incoming line of the electrical equipment, can initially suppress and discharge large-value lightning overvoltages entering the prefabricated substation, preventing direct impact of lightning overvoltages on the electrical equipment. The secondary surge protector, located in the control circuit of the electrical equipment, provides further fine protection against residual overvoltages after passing through the primary surge protector, ensuring that sensitive equipment in the control circuit is not affected by lightning overvoltages. This greatly improves the electrical equipment's tolerance to lightning overvoltages and ensures the stable operation of the electrical equipment.

[0036] Please see Figure 1 , Figure 2 and Figure 3 The top grounding down conductor 202, the side wall grounding down conductor 302, and the internal grounding down conductor 402 are all made of copper. Copper has good conductivity and can quickly and effectively introduce lightning current into the ground, reduce the resistance of the grounding down conductor itself, reduce the voltage drop of lightning current on the down conductor, thereby avoiding backflash caused by excessive down conductor resistance, ensuring that lightning energy can be smoothly discharged into the ground, and improving the reliability and safety of the entire lightning protection system.

[0037] Please see Figure 1 , Figure 2 and Figure 6 The top of the box-type substation enclosure 1 is equipped with a fixing bracket 6 for fixing the lightning rod 201. The fixing bracket 6 is made of stainless steel, which has good corrosion resistance and mechanical strength. It can fix the lightning rod 201 stably for a long time, ensuring that the lightning rod 201 will not loosen or be damaged under various harsh environmental conditions. This ensures that the lightning rod 201 is always in good working condition, continuously and effectively playing its role in lightning protection, and improving the stability and reliability of the entire lightning protection module layout structure.

[0038] Please see Figure 1 , Figure 2 and Figure 5 An insulating gasket 7 is provided between the surge arrester 301 and the side wall of the box-type substation enclosure 1. The insulating gasket 7 can effectively isolate the electrical connection between the surge arrester 301 and the side wall of the enclosure, and prevent some of the lightning current from being conducted through the side wall of the enclosure when the lightning current is introduced to the ground through the surge arrester 301. This prevents the lightning current from causing a potential rise in the enclosure, reduces the possibility of lightning backflash, further protects the equipment inside the enclosure from damage by lightning overvoltage, and improves the lightning protection safety of the box-type substation.

[0039] Please see Figure 1 The front of the box-type substation enclosure 1 has two hinged doors 8. The inside of each door 8 is equipped with an observation window. The two doors 8 facilitate the entry and exit of personnel to carry out equipment installation, commissioning, maintenance and repair. The observation window allows personnel to observe the operating status of the equipment inside the enclosure from the outside without opening the doors 8.

[0040] This embodiment presents a lightning protection module layout structure for a prefabricated substation. By installing lightning protection modules with different functions on the top, side walls, and inside the prefabricated substation enclosure 1, a multi-layered lightning protection system from the outside to the inside is formed. This system can effectively intercept lightning intrusions of different directions and intensities, greatly improving the lightning protection capability of the prefabricated substation. The lightning protection modules work together through a reasonable layout and connection method. The grounding down conductors of the top lightning protection module 2, the side wall lightning protection module 3, and the internal lightning protection module 4 are all connected to the same grounding grid 5, ensuring the rapid discharge of lightning current and reducing the risk of damage to electrical equipment.

[0041] It should be noted that the installation location of surge protector 401 needs to be determined according to the location of the electrical equipment inside the box 1 of the prefabricated substation.

[0042] The working principle of the above embodiments is as follows:

[0043] When lightning strikes the prefabricated substation directly, the early discharge lightning rods installed at the four corners of the top of the enclosure will generate an upward leader before other objects, more effectively capturing the lightning leader and drawing the lightning into themselves. The lightning current is then rapidly conducted through the top grounding down conductor 202 connected to the lightning rod 201 to the grounding grid 5 at the bottom of the enclosure and discharged into the earth. If the lightning induces an overvoltage near the side wall of the enclosure, multiple surge arresters 301 evenly distributed around the perimeter of the enclosure will activate, regardless of the direction of the lightning strike. Regardless of the height at which the lightning strikes approach the enclosure, these surge arresters 301 can respond promptly. Lightning energy is conducted to the grounding grid 5 through the side-wall grounding down conductor 302 connected to the surge arrester 301, and discharged into the earth. This enhances the protection against side-wall lightning-induced overvoltages and reduces the indirect impact of lightning on the equipment inside the enclosure. For lightning overvoltages entering the prefabricated substation, the primary surge protector is installed near the incoming line of the electrical equipment. It can initially suppress and discharge large-value lightning overvoltages, preventing direct impact from lightning overvoltages. After a lightning strikes electrical equipment, any residual overvoltage after passing through the primary surge protector will be precisely protected by a secondary surge protector installed in the control circuit of the electrical equipment. This ensures that sensitive equipment in the control circuit is not affected by lightning overvoltage, improving the electrical equipment's tolerance to lightning overvoltage. The top grounding down conductor 202, the side wall grounding down conductor 302, and the internal grounding down conductor 402 are all connected to the grounding grid 5 at the bottom of the box-type substation enclosure 1, ensuring a rapid discharge path for lightning current. When lightning current is conducted to the grounding grid 5 through each lightning protection module and the grounding down conductor, the grounding grid 5 can quickly disperse and discharge the lightning energy into the earth, reducing the potential rise caused by the lightning current in the enclosure and internal equipment, reducing the possibility of lightning backflash, and thus reducing the risk of damage to electrical equipment. The overall layout structure constructs a multi-layered lightning protection system from the outside to the inside. When lightning strikes, each lightning protection module works together according to the lightning's intrusion path and intensity to effectively intercept lightning and protect the safety of the electrical equipment inside the box-type substation.

[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0045] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lightning protection module layout structure for a prefabricated substation, comprising a prefabricated substation enclosure (1), characterized in that: The top of the box-type substation enclosure (1) is equipped with a top lightning protection module (2), the side walls of the box-type substation enclosure (1) are equipped with side wall lightning protection modules (3), and the interior of the box-type substation enclosure (1) is equipped with an internal lightning protection module (4). The top lightning protection module (2) includes lightning rods (201) installed at the four corners of the top of the box-type substation enclosure (1). The lightning rods (201) are connected to a top grounding down conductor (202). The top grounding down conductor (202) extends to the bottom of the box-type substation enclosure (1) and is grounded. The side wall lightning protection module (3) includes multiple surge arresters (301) evenly distributed around the side walls of the box-type substation enclosure (1). The surge arrester (301) is connected to the side wall grounding down conductor (302), and the surge arrester (301) is grounded through the side wall grounding down conductor (302). The internal surge protection module (4) includes a surge protector (401) installed above the electrical equipment inside the box-type substation box (1). The surge protector (401) is connected to the internal grounding down conductor (402), and the surge protector (401) is grounded through the internal grounding down conductor (402). The bottom of the box-type substation box (1) is provided with a grounding grid (5). The internal grounding down conductor (402), the top grounding down conductor (202), and the side wall grounding down conductor (302) are all connected to the grounding grid (5) at the bottom of the box-type substation box (1).

2. The lightning protection module layout structure of a prefabricated substation according to claim 1, characterized in that: The lightning rod (201) is an early discharge type lightning rod, and the installation height of the lightning rod (201) is higher than the top of other equipment in the box-type substation box (1).

3. The lightning protection module layout structure of a prefabricated substation according to claim 1, characterized in that: The number of surge arresters (301) installed along the height direction of the side wall of the box-type substation box (1) is greater than two at equal intervals.

4. The lightning protection module layout structure of a prefabricated substation according to claim 1, characterized in that: The surge protector (401) is configured in a hierarchical manner. The surge protector (401) is divided into a primary surge protector and a secondary surge protector. The primary surge protector is located near the incoming line of the electrical equipment, and the secondary surge protector is located in the control circuit of the electrical equipment.

5. The lightning protection module layout structure of a prefabricated substation according to claim 1, characterized in that: The top grounding lead (202), side wall grounding lead (302), and internal grounding lead (402) are all made of copper.

6. The lightning protection module layout structure of a prefabricated substation according to claim 1, characterized in that: The top of the box-type substation box (1) is provided with a fixing bracket (6) for fixing the lightning rod (201), and the fixing bracket (6) is made of stainless steel.

7. The lightning protection module layout structure of a prefabricated substation according to claim 1, characterized in that: An insulating gasket (7) is provided between the surge arrester (301) and the side wall of the box-type substation enclosure (1).

8. The lightning protection module layout structure of a prefabricated substation according to claim 1, characterized in that: The front of the box-type substation box (1) has two hinged doors (8), and the inside of the doors (8) is provided with observation windows.

Images